/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.huodongrili.calender.widget;

import com.huodongrili.calender.R;

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.widget.LinearLayout;

public class WeightedLinearLayout extends LinearLayout {
	private float mMajorWeight;
	private float mMinorWeight;
	
	private float mMajorHeight;
	private float mMinorHeight;

	public WeightedLinearLayout(Context context) {
		super(context);
	}

	public WeightedLinearLayout(Context context, AttributeSet attrs) {
		super(context, attrs);

		TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.weight_Layout_attr);

		mMajorWeight = a.getFloat(
				R.styleable.weight_Layout_attr_majorWeight, 0.0f);
		mMinorWeight = a.getFloat(
				R.styleable.weight_Layout_attr_minorWeight, 0.0f);
		
		mMajorHeight = a.getFloat(
				R.styleable.weight_Layout_attr_majorHeight, 0.0f);
		mMinorHeight = a.getFloat(
				R.styleable.weight_Layout_attr_minorHeight, 0.0f);

		a.recycle();
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		final DisplayMetrics metrics = getContext().getResources()
				.getDisplayMetrics();
		final int screenWidth = metrics.widthPixels;
		final int screenHeight = metrics.heightPixels;
		final boolean isPortrait = screenWidth < screenHeight;

		final int widthMode = MeasureSpec.getMode(widthMeasureSpec);

		super.onMeasure(widthMeasureSpec, heightMeasureSpec);

		int width = getMeasuredWidth();
		int height = getMeasuredHeight();
		boolean measure = false;

		widthMeasureSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
		heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);

		final float widthWeight = isPortrait ? mMinorWeight : mMajorWeight;
		if (widthMode == MeasureSpec.AT_MOST && widthWeight > 0.0f) {
			if (width < (screenWidth * widthWeight)) {
				widthMeasureSpec = MeasureSpec.makeMeasureSpec(
						(int) (screenWidth * widthWeight), MeasureSpec.EXACTLY);
				measure = true;
			}
		}
		
		final float heightWeight = isPortrait ? mMajorHeight  :mMinorHeight ;
		if (screenHeight== height && heightWeight > 0.0f) {
				heightMeasureSpec = MeasureSpec.makeMeasureSpec(
						(int) (screenHeight * heightWeight), MeasureSpec.EXACTLY);
				measure = true;
		}

		if (measure) {
			super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		}
	}
}
